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High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory - China Suppliers & Factory Products

Our high-performance quartz rods are manufactured from premium fused silica (SiO₂ ≥ 99.99%), making them a top choice among suppliers in China. These cylindrical products are renowned for their exceptional high-temperature resistance, with a softening point of approximately 1730°C and long-term stability at temperatures up to 1100°C. Additionally, they boast excellent UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, resisting most acids except hydrofluoric acid (HF). With outstanding electrical insulation properties, these quartz rods are indispensable in various applications, including optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment. Sourced directly from our factory, they serve as essential semi-finished materials for the manufacturing of tubes, supports, and optical components, ensuring precision and reliability in harsh environments.

As a leading supplier in China, our quartz rods are produced by melting high-purity natural or synthetic quartz. The resulting solid rods are crafted through advanced drawing or molding techniques, offering unmatched quality for various industrial applications.

Product Description

Material & Quality

Made from 99.99% high-purity fused silica, our large-diameter quartz tube is free of impurities, ensuring minimal thermal expansion and maximum resistance to thermal shock (can withstand rapid temperature changes from -20℃ to 1200℃). It is non-toxic, non-porous, and resistant to most acids (except hydrofluoric acid) and alkaline solutions, making it suitable for corrosive chemical processing.

Core Advantages

Superior thermal stability: Operates continuously at 1100℃, short-term use up to 1450℃
Excellent mechanical strength: High compressive strength and impact resistance, cracking during installation and use
Customization support: Cut-to-length, flanged ends, and drilled holes available per customer drawings
Long service life: Resists aging and oxidation even under prolonged high-temperature exposure

Key Application Fields of Large-Diameter Quartz Tubes

Large-diameter quartz tubes are essential components in various high-end industries, thanks to their excellent thermal stability, chemical inertness and high light transmittance.

Semiconductor Industry

They are widely used in diffusion furnaces, oxidation furnaces and ion implantation equipment for wafer processing. The high purity and corrosion resistance of quartz tubes can ensure no pollution to semiconductor materials during high-temperature processes.
Solar Energy Sector

Applied to the production line of photovoltaic cells and silicon wafers, they serve as the core components of high-temperature sintering and coating equipment, helping to improve the conversion efficiency of solar cells.
High-Temperature Heat Treatment & Metallurgy

Used as furnace linings and heating chambers in annealing furnaces, quenching furnaces and sintering furnaces, they can withstand continuous high-temperature operation up to 1100℃ and resist thermal shock.
Laboratory & Scientific Research

Employed in high-temperature chemical reactors, vacuum tubes and chemical vapor deposition (CVD) systems, suitable for harsh experimental environments such as strong acid corrosion and high-temperature pyrolysis.
Optical Fiber & Optoelectronics Industry

Serve as protective sleeves and drawing molds in optical fiber preform production, ensuring the purity and uniformity of optical fiber materials during the high-temperature drawing process.
Environmental Protection & Waste Treatment

Used in high-temperature waste gas incinerators and hazardous waste treatment equipment, taking advantage of their high-temperature resistance and chemical stability to decompose harmful substances.

Product Specifications

Product Details

Cross-Sectional Dimensions, Tolerances & Standard Lengths

Cross-sectional Dimensions	Tolerances	Standard Lengths
3×3	±0.1	100–1000
4×4	±0.1	100–1000
5×5	±0.1	100–1000
6×6	±0.15	100–1000
8×8	±0.15	100–1000
10×10	±0.2	100–1000
15×15	±0.2	100–500
20×20	±0.25	100–500

All dimensions are in millimeters (mm). Tolerances may vary depending on material grade and manufacturing process. Standard lengths are indicative; custom lengths may be available upon request.

Frequently Asked Questions (FAQ)

❓ What do the cross-sectional dimensions refer to?

The cross-sectional dimensions (e.g., 3×3, 10×10) refer to the width and height of the material's cross-section in millimeters. These are the standard square profiles available for selection.

❓ What does the tolerance value (±) mean?

The tolerance value indicates the permissible deviation from the nominal dimension during manufacturing. For example, ±0.1 mm means the actual size may be up to 0.1 mm larger or smaller than the specified dimension.

❓ Why do larger sizes have higher tolerance values?

As dimensions increase, slight variations in material expansion, machining, and processing become more pronounced. Larger cross-sections therefore carry slightly wider tolerances to account for these natural manufacturing variables.

❓ Why are standard lengths shorter for larger cross-sections (15×15 and 20×20)?

Larger cross-sections are heavier and more difficult to handle in longer lengths. The maximum standard length is reduced to 500 mm for 15×15 and 20×20 profiles to ensure safe handling, structural integrity, and practical usability.

❓ Can I order custom lengths outside of the standard range?

Custom lengths may be available upon request depending on the material and production capacity. Please contact us directly to discuss your specific requirements and confirm availability for non-standard lengths.

❓ Are all dimensions listed in millimeters?

Yes, all cross-sectional dimensions, tolerances, and standard lengths in the table are expressed in millimeters (mm), which is the standard unit used for precision component specifications.

Packaging and Shipping

Why Choose Southeast Quartz?

Southeast Quartz relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier to global customers. All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test, and purity test before leaving the factory to ensure stable performance, no impurities, and no leakage.